Swapped tbi to carburetor?

I have a 92 Chevy G 30 that I was having trouble out of ECU after installing a GM crate motor so I pulled the tbi off installed a Edelbrock street performer intake with a brand new Edelbrock avs2 carburetor. I didn't change fuel pump, but added a fuel pressure regulator and when I finally got it running it wouldn't run under load. So, it since the carburetor had an extra spot for an extra gas feed I hook it up has well hoping it would give the extra gas. It sounded like it needed and it still ran like crap, so I had it hauled home and decided to change fuel pump to a mechanical fuel pump when I dropped the tank to remove the fuel pump. I'm the tank it look like it had been on fire (from over working itself) now that I changed fuel pump it runs awesome sitting still but after I take off it shuts off unless then a ½ mile like it's ran out of gas.
I can't figure it out.
For notes: the street performer intake has one big hole for carburetor to sit on and the spacer I added is the same, but I think the carburetor is a quad 4 type of carburetor.